Mountainous millipedes in Vietnam. II. A conspicuous Tylopus species from Northern Vietnam (Diplopoda, Polydesmida, Paradoxosomatidae).

A conspicuous Tylopus species is described from Northern Vietnam, namely T.helicorthomorphoides sp. nov. The new species is clearly diagnosed by the gonopodal solenophore completely sheathing the solenomere, both being coiled three times, and the absence of spine z and process h of the gonopod. Fragments of the COI and 16S rRNA genes were extracted, and the phylogenetic analysis also supports the new species.